Did a water change last week, poop was all reddish like the pellets. And no visible woundson hime anywhere. He only does this when I get closer to the tank like hes trying to scare me off. Hes eating like a champ and is very active.
It's breeding behavior. Like the other person said.....hoping to get a lady. Showing his dominance/readiness to spawn. When you get close to his tank he is letting you know that it is his area.